John thomas reid and henry thorp



UNITED STATES PATENT OFFICE.

JOHN THOMAS REID AND HENRY THORP, OF PENDLETON, ENGLAND.

DYEING' TEXTILE'FIBERS, YARNS, AND' FABRICS.

SPECIFICATION forming part of Letters Patent No. 612,274, dated October11, 1898.

I Application filed May 1-7. 1898. Serial No. 680,9 75. (No specimens.)

To all whom it may concern.-

Be it known that We, JOHN THOMAS REID and HENRY THORP, subjects of theQueen of Great Britain, and residents of Pendleton, near Manchester, inthe county of Lancaster, England, have invented certain new and usefulImprovements in Dyeing Textile Fibers, Yarns, and Fabrics, (for which wehave made application for Letters Patent in Great Britain, numbered3,604, dated February 14:, 1898,) of which the following isaspecification.

Our invention relates to improvements in dyeing vegetable fibers, yarns,and fabrics, hereinafter for convenience of description referred to asfibrous materials; and the ob ject of our invention is to obtain'certainfast and permanent colors known as khaki shades.

In carrying our invention into effect we first scour the fibrousmaterials to free them from all impurities, then dry, and when dry runthem through a bath of olein-oil and water in the proportion of, say,two quarts of oil to sixteen gallons of water. Te then dry the fibrousmaterials and afterward impregnate them with the following dye liquor:twenty gallons of a solution of acetate of chromium, (20 Twaddelh)twenty gallons of a solution of acetate of iron, (12 Twaddelh) and eightounces of alizarin-blue S dissolved in four gallons of a solution ofbisulfite of soda or potash, (54 Twaddell.) When thoroughly impregnatedwith the above liquor, we mangle the fibrous materials and then drythem. \Ve then steam the fibrous materials for about an hour at, say, asteam-pressure of four pounds to the square inch and subsequentlydevelop and fix the color by passing the fibrous materials through analkaline bath composed, say, of sixteen gallonsof water, eight pounds ofcommon soda, and three gallons of limewater. We then'b5 preference soapthe fibrous materials and finally wash and dry them.

For full or dark shades we may repeat the above process as often asrequired and may vary the proportions for different shades as required.

In place of the alizarin-blue S we might employ ordinary alizarin-blue,gallein, cerulein, or like product of anthracene, and in place of theacetates we might employ any other suitable salts of chromium and iron.

Having now particularly described and ascertained the nature of our saidinvention and in what manner the sameis to be performed, we declare thatwhat we claim, and desire to secure by Letters Patent of the UnitedStates, 1s

The process of dyeing vegetable fibrous materials certain fast andpermanent colors known as khaki shades which process consists in passingthe materials through a bath of olein-oil, drying them, impregnatingthem with a mixed solution of alizarin-blue S, chromium and iron salts,then drying, steaming and developing the color by treatment with analkali substantially as herein set forth.

In witness whereof We have hereunto set our hands in presence of twowitnesses.

J GEN THOMAS REID. HENRY THORP. Witnesses:

S. W. GILLETT, HERBERT R. ABBEY.

